Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations already declare readOnlyHint=true and destructiveHint=false, and the description is fully consistent with that, explicitly stating it opens nothing by itself. It adds genuine value beyond annotations by describing the shape of the return value (step-by-step screens, buttons, fields) and the follow-up browser-tool workflow. The aside about Booksy's lack of a self-serve API is useful motivation but slightly off-topic for behavior.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The key correction (it returns steps, it does not act) is reasonably front-loaded, but the second sentence is a long semicolon-chained run-on mixing the return format with the follow-up workflow. 'From ChatGPT, Claude or any AI agent' is filler, and the API-availability note reads as justification rather than agent-relevant instruction.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

With no output schema, the description carries the burden of explaining what comes back, and it does so concretely (screens, buttons, fields). For a zero-parameter, read-only guide tool, an agent has enough to call it and to know what to do next; only the relationship to cotlet_app_guide is left unstated.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

The tool takes zero parameters, so the baseline is 4 and there is nothing for the description to disambiguate. It implicitly explains the parameterless design by framing the output as a generic how-to guide rather than a parameterized action on a specific booking.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description names a specific resource and action (rescheduling a Booksy booking) and crucially corrects the impression left by the name and title: the tool does not perform the reschedule, it returns step-by-step instructions (screens, buttons, fields). That is a clear, distinct purpose. It does not, however, distinguish itself from the sibling cotlet_app_guide, which plausibly serves a similar guide-returning role.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

It gives explicit workflow guidance: call this first to get the steps, then execute them with the cotlet_browser_* tools in the user's Booksy Cloud Browser. It also implicitly says the tool will not act on its own ('opens nothing by itself'). It offers no exclusions, e.g. when to prefer booksy_create_booking or the generic cotlet_app_guide instead.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.